Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d877f0f28d4a72f…

MALICIOUS

PDF

73.6 KB Created: 2021-01-06 09:58:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f45323fddff81a696ea237fcd15211d0 SHA-1: 1de0e9b82e6ce90fb5f50d8e1c09e56840556560 SHA-256: 9d877f0f28d4a72fb19c1b854448f413215bf4b6218463e376a50e961ab0f185
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many of which are to PDF files, suggesting a link farm or redirection mechanism. One of the primary URLs, 'https://traffking.ru/aws?utm_term=what+is+cdf+and+pdf+in+statistics', is likely used to direct users to a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a potential for exploiting PDF vulnerabilities or redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/aws?utm_term=what+is+cdf+and+pdf+in+statistics PDF link annotation
    • https://cdn.sqhk.co/xubulozirod/iifJP4F/54836973240.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/Q1jigs1/bamepujig.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/BuMlgec/spastic_colon_diet.pdfIn PDF document text
    • https://doxagazezuzizum.weebly.com/uploads/1/3/1/6/131606815/ececc.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/hhhic4N/guess_the_word_cheat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5a3d21d0-9e26-4dff-8b00-9b38ceafb6f5/rofenegap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5622bd8e-4d70-4a34-a15c-e0cd1eb39cf0/colligative_properties_worksheet_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40897a91-2bc5-43e8-a1b6-19df4244e849/magic_the_gathering_liliana.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/lovoton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240e5261-63bd-448e-bf69-02cd4f0910c9/namefuvidu.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/skam_france_season_3_episode_6_insomnie.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AD 4688 bytes
SHA-256: 37b3e28d5e7d0f8ffae1367eb43ba056ec3155023b456e5ce44cd938cd44d15a
font_01_sfnt_off0000e895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE895 10232 bytes
SHA-256: 6e28fe0ab0d41650d82bf34dcfbc612b06c8bde3d04f595281bfbcb81bb6a58c
font_02_sfnt_off00010b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B95 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.